Fastening device



Jan. 24. 1928. KLEN ET AL R 16,858

FASTENING DEVICE Original Filed Oct. 16. 19-

t INVENTOR5 -fruzry f z'rzand v *I I Reissued J an. 24, 1928.

UNITED STATES IRVING KLEIN AND SAMUEL HAMMER,

F BROOKLYN, NEW YORK, ASSIGNOBQ BY MESNE ASSIGNMENTS, TO WESTINGHOUSE ELECTRIC & MANUFACTURDIG OOH- PANY, A CORPORATION OF PENNSYLVANIL v rasrnnmo DEVICE.

Original No. 1,551,311, dated August 25, 1925, Serial reissue filed August 25,1921. Serial No. 215,488.

This invention relates to fastening devices and more particularly to a simply constructcd and easily operated device for quickly andsccurely fastening two parts or members to each other.

It is the primary object and purpose of our present improvements to provide a fastening device of the above-character which is primarily designed for the purpose of uring the meta] trim or cover plate upon the open side of the electric panel board box after the latter has been mounted in its pernianent position in a wall structure. However, it will he clearly understood as this description proceeds that our invention is readily adaptable to numerous other analogous uses. In one proposed embodiment of our improvements we provide a locking member adapted to be engaged upon one 2 side of the metal trim or cover. plate, and

means operable from the opposite side of said plate and connected with the locking member whereby the latter may be positioned in engagement with a flange or. other fixed part upon which said plate is to be secured and then subsequently adjusted into tight clamp-- ing engagement with such flange whereby the two parts are rigidly fixed against relative movement.

It is another object. of'onr invention to provide a means in a device of this character which will operate to ellectively prevent the casual movement of said ,locking men'iber from its locking position, thus obviating the possible loosening of the lmrking means and relative shifting of the parts connected thereby.

\Vith the above and other objects in view, the invention consists in the improved fas- 4n toning device and in the form, construction and relativearrangement of its several parts as will be hereinafter more fully described, illustrated in the accompanying drawings and subsequently incorporated in-thesub- 5 joined claims.

In the drawing wherein we have illustrated one practical and satisfactory embodiment of the invention and in which similar reference characters designate corresponding no parts throughout the several views:

the form of anangle bar 5, which'isfixcd to the inner face in). 608,959, filed 0mm 10, 1923. Application;

Figure 1 is a, front elevation showing our device as applied to the metal trim or cover plate and before adjustment to its final lockingrposition;

igure 2 is an elevation of the reverse side of the cover plate showing the initial relative position of the elements;

Figure 3 is a view similar to Figure 1, il-

lustrating the fastening device in its final locking position Figure 4 is a view similar to Figure 2; thepeas of the device being shown in looking position;

- F-i re .5 is a horizontal section taken on the line 5 5 of Figure 4;

Figure 6 is a vertical section taken on the line (r-60f Figure 4; and

Figure 7 i s a detail perspective view of one of the parts.

In the present instance we have selected for 'purposes of illustration an embodiment of our invention as preferably employed for the purposeof dctachably locking or securing the metal trim or cover plate upon the -*1 open side of an electrical panel board box or 7 casing. Such illustration, however, implies no limitations upon the possible utility of our invention since it is manifest that the device is applicable to numerous other uses, either in the form illustrated, or in other alternative embodiments thereof. It will, therefore, be'understood that our invention is of more or less general application and use for the, purpose of securely fastening or locking together two detachable parts. In the drawing, one of these parts is shown in one flange of T p of a marginal wall 6 of the box or casing.- The panel board carrying the switches and fuse plug recep taclcs is suitably mounted within this box or casing. It is the practice to secure the metal trim or cover plate-upon the casing after mountingthe latter in the wall structure." Not infrequently, due to thecarelessness of the workmen, in arranging and securing the box or casing imposition, its walls will be somewhat distorted. Asaconsequence thereof, it is not possible to properly register the openings in the cover plate with the openings screw 13 in the flange of the box wall which receive the fastening bolts or screws. Accordingly,

considerable difiiculty is experienced in properly attaching and securing the metal trim or cover plate upon the walls of the box structure. Applicants improvements obviate this difficulty and permit of the easy, ,quick 51nd secure attachment vof the metal trim or cover plate in its applied position. To this end we provide the cover plate 7 at suitably spaced points with a series of bolt or screw receiving openings 8 each of which communicates with a sector-shaped opening 9 of relatively large area. I

The locking member 1021s herein shown is in the form of an elongated channel shaped bar having parallel longitudinally extending flanges ll. The intermediate port on of this-bar is centrally formed vith an internally threaded boss 12 with which the has loose threaded engagement. spaced relation to said boss longitudinally of the member 10 an. opening 12 formed therein.

As shown in Figure 7 of the drawing, the adjusting element for the locking member 10 consists of a metal disc 14 having a central opening 15 therein to receive the screw 13. Upon one side of this disc at the edge thereof a laterally extending arm 16 is formed and in spaced relation to said arm a lug 17 projects from the same face of said disc at the edge thereof.

In the application and ing device the locking use of our fastenmember 10 is first arranged upon the 1nner side of the metal trim or cover late 7 and after en a iiw the adjusting element 14 upon the screw 13,-

said sc ew is inserted from the opposite side of said plate through the opening 8 and is threaded inthe boss 12 of the locking member. In this connection of the screw to the locking member, the arm 16 on the element 14 passes through the :=cctt)r-sl1npe(i opening 9 of the cover plate and through the opening 12' in the locking' men1bcr,while the lug 1.7 of the element l4 bears against the face of the plate 7. In applying the cover plate the screw 13 is turned and the locking member 10 positioned as seen in Figure 2 so that it'extcnds in the lengthwise direction of the edge of said plate. The plate 7 I is then arranged with its marginal portion bearing against the inwardly extending flanges of the angle bars on the box walls as seen in Figure 5 of the drawings. e movement of the member 10to.

"proper position as shown in Figure 2, to

permit of the engagement of the plate 7 upon the angle bars is limited by contact of the arm 16 with one edge of the opening 9 in the cover plate. After the plate 7 has been arranged in its proper position, the discadjusting element 14 is turned so as to be readily undcrstoor l.

move the locking member 10 to a position substantially at ri -ht angles to the flange of the angle bar 5 and with one end of said member engaged over the inwardly cxtcndthe boss 12 and the head of the screw bearing against the element ll thus drawing the locking member to the position seen in Fig ure 5, with one end thereof contacting against an inner face of the plate T, while the other end ting-rent is tightly clamped upon the inner side oi? the flange (ill the angle bar The artn 16 and the lug 17 being positioned in the opposite ends of the opcnmg 9 and side arm extending through the opening 12 in the locking member, clinctually, prevents any casual rotation of the locking mei'nber upon the screw 13 whereby said member might become disei'igaged from the flange on the angle bar. Thus it will be apparent that alter the several fastening devices carried by the metal. trim or cover plate 7 have been properly adjusted as above explained. said plate will be securely and rigidly held in its fixed position relative to the walls of the box or casing. By the elimination. of registering openings in the plate 7- and the angle bar flange as heretofore provided, we are enabled to properly and se urely fix the cover plate in its ap plied position. although said flanges on the box walls might be somewhat distorted from their original condition in the piceess of mounting the box or casing in the wall structure.

From the foregoing description considered in'o'onnection with the accompanying drawing. the construction, mannerof use and several ad vantages of our invention will it will be observed that the azm'cral parts of the device are of wry simple form so that therein be pro duced in large quantities at small cost. It will also be seen that the use of our improvements involves no material changes in the form or construction of the parts to be fastened or connected thereby. \Ve have above described a particular construction of the locking member. but.it will be understood that this member as well the other elements of the device are susceptible of minor modifications whichmay be necessary ing member adapted to be arranged upon one side of a part to be fastened, and means for adjusting and securing said member in locking engagement with a second part, said means including a screw to extend through an opening in thefirst named part and having threaded connection with said locking member, and an element mounted upon said screw and coacting with the locking mem-- her to prevent turning movement of the latter relative to said first part.

2. A fastening device comprising a locking member adapted to be arranged upon one side of a part to be fastened, and means for adjusting and securing said member in locking engagement with a second part, said means including a screw to extend through an opening in the first named part and having'tiireaded connection with said locking member, and an element mounted upon said screw having means coacting with said first named art to prevent turning movement of said e ementwith respect to the first part and said means also including a part coacting with the locking element to prevent turning movement of the latter from its locking position. t

3. In combination with the parts to be fastened, one of said parts having a screw receiving opening and a sector-shaped o ning communicating therewith, a 100.11g 'member'adapted to be arranged upon one side of said part and having a threaded ,opening' therein, a screw insertable from the opposite side of said part through said screw receivin opening and engaged with the threadetf opening of said locking member,

- and an element engaged upon said screw and havln a part extending through the sector shape 0 ning and coacting with the locking mem ,r to prevent turning movement of the latter from its locking position.

4. In combination with the parts to be fastened,'one of saidparts having a screw receiving opening and a sector shaped o n ing communicating therewith, 9. 10 ng member adapted to be arranged upon one sided said part and having a threaded opening therein, a screw insertable. from the opposite side of said part through said screw receivin opening and enga ed 'with the threade opening of said loc ing member whereby said member may be moved into clamping engagement with another said part, and an element loosely enga ed upon said screw havin an arm to exten through said sector shaped opening'and alsgap'flwided with a lug adapted toengage in ing, said lug and arm prevent-mg the tanning movemeutof said element in eitherdirec I opention with respect to one of the said partsandsaid arm meeting with the locking element for moving the latter to and from its locked position.

5. A fjastenin device for two parts one of which is movab c and is adapted to be fastcncd with respect to the other, comprising an oblong locking member pivoted to the inner side of the movable part and adapted to.

be turned so as to have an end thereof overlapping the inner side of the other or fixed part, means for turning said oblong locking member from the outside of the two parts,

and coo 'ierating with the movable part for preventing the locking member from turning when it has been turned to locking position.

6. A fastening device comprising a locking member adapted to be arranged upon one side of a part to be fastened, and means for adjusting and securing said member in locking engagementwith a second part, said means including a screw having threaded connection with said locking member and extending through an openlngin "the first named part and operable for fastenin the locking member on thereverse side 0 said first part from said locking member, and an element mounted upon the said screw and the reverse side of said part from the look ing member and having projections extending through the part coacting with the looking member to prevent turning movement of the latter relative to said first art.

7. A fastening device comprising a locking member adapted to be arranged u'on one side of a part to be fastened, and Bus ins for adjusting and securing said member in locking en agement with a second part, said .Ineans inc uding a screw havingmthreaded connection with said locking. mem

ten'ding through an opening in the first named part and operable for fastenin the locking member on the reverse side 0 said first part? from said lockin member and anelement mounted upon sai screw on the re-.'

verse sidof said part from the lockin member, having means extending througl the part enacting with said first named part to prevciit turning movement of said element with respect thereto. and said means also including a part coac'ting with the lock-' r and ex ion I ing element to prevent turning movement of the latter from its locking position.

8. The combination with a support and a cover therefor, of-a clamp member pivotally mounted on the interior of the cover for en gaging the su port, means operable from the outer side o the cover for operating the clamp member, and means operable from the outer side of, the cover for rotating the clamp. p

9. A clamp for connecting a pair of mem.- bers comprising a device pivotally mounted on one sideof one member and engaging the other member, means operable from the nae axes, and separate means operuble from the other side of the cover for moving them-(un member about either resl'ieetive axis.

In testimony whereof, We have hereunto subscribed our names.

iiuvmu KLEIN. SAMUEL HAMM en. 

